30786930 has 24 divisors (see below), whose sum is σ = 80046252. Its totient is φ = 8209824.

The previous prime is 30786919. The next prime is 30786961. The reversal of 30786930 is 3968703.

It can be written as a sum of positive squares in 2 ways, for example, as 25070049 + 5716881 = 5007^2 + 2391^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170949 + ... + 171128.

Almost surely, 2^30786930 is an apocalyptic number.

30786930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30786930 is an abundant number, since it is smaller than the sum of its proper divisors (49259322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30786930 is a wasteful number, since it uses less digits than its factorization.

30786930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342090 (or 342087 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30786930 is about 5548.5971199935. The cubic root of 30786930 is about 313.4166960427.

The spelling of 30786930 in words is "thirty million, seven hundred eighty-six thousand, nine hundred thirty".